Element = Lattice = Model = Element: Si
Lattice: hcp
Model: Tersoff_LAMMPS_MunetohMotookaMoriguchi_2007_SiO__MO_501246546792_000
Computed model cutoff of 2.799999996200229 Angstroms
Computed isolated atomic energy of 0.0 eV for species Si

==============================================================================
==============================================================================
 Starting optimization to find optimum lattice constant 'a' with c/a fixed to
 sqrt(8/3)
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = 1.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.61329125594348, total energy = -13.838619477983569

Attempting to perform relaxation using initial lattice constant guess of a = 1.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 38
         Function evaluations: 78
Results for this minimization:
  a = 2.6132912526838474, total energy = -13.83861947798358

Attempting to perform relaxation using initial lattice constant guess of a = 1.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 39
         Function evaluations: 81
Results for this minimization:
  a = 2.6132912498433143, total energy = -13.838619477983574

Attempting to perform relaxation using initial lattice constant guess of a = 1.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.6132912499830168, total energy = -13.838619477983578

Attempting to perform relaxation using initial lattice constant guess of a = 1.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 2.61329125016928, total energy = -13.838619477983567

Attempting to perform relaxation using initial lattice constant guess of a = 1.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 37
         Function evaluations: 77
Results for this minimization:
  a = 2.613291252171623, total energy = -13.838619477983576

Attempting to perform relaxation using initial lattice constant guess of a = 1.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 2.6132912544999267, total energy = -13.838619477983576

Attempting to perform relaxation using initial lattice constant guess of a = 1.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 36
         Function evaluations: 75
Results for this minimization:
  a = 2.6132912513567135, total energy = -13.838619477983576

Attempting to perform relaxation using initial lattice constant guess of a = 2.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 36
         Function evaluations: 75
Results for this minimization:
  a = 2.613291255384685, total energy = -13.838619477983574

Attempting to perform relaxation using initial lattice constant guess of a = 2.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 34
         Function evaluations: 71
Results for this minimization:
  a = 2.6132912521599807, total energy = -13.838619477983574

Attempting to perform relaxation using initial lattice constant guess of a = 2.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 35
         Function evaluations: 73
Results for this minimization:
  a = 2.613291253993521, total energy = -13.838619477983574

Attempting to perform relaxation using initial lattice constant guess of a = 2.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 34
         Function evaluations: 73
Results for this minimization:
  a = 2.613291250518523, total energy = -13.83861947798358

Attempting to perform relaxation using initial lattice constant guess of a = 2.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 32
         Function evaluations: 67
Results for this minimization:
  a = 2.6132912508328445, total energy = -13.838619477983569

Attempting to perform relaxation using initial lattice constant guess of a = 2.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 33
         Function evaluations: 70
Results for this minimization:
  a = 2.6132912524219134, total energy = -13.838619477983574

Attempting to perform relaxation using initial lattice constant guess of a = 2.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 33
         Function evaluations: 68
Results for this minimization:
  a = 2.613291251967893, total energy = -13.838619477983578

Attempting to perform relaxation using initial lattice constant guess of a = 2.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 34
         Function evaluations: 72
Results for this minimization:
  a = 2.613291255757211, total energy = -13.838619477983565

Attempting to perform relaxation using initial lattice constant guess of a = 3.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.0, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.125, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.25, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.375, total energy = 0.0

Attempting to perform relaxation using initial lattice constant guess of a = 3.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: 0.000000
         Iterations: 32
         Function evaluations: 95
Results for this minimization:
  a = 3.5, total energy = 0.0

==============================================================================
==============================================================================
 Starting optimization with both a and c/a relaxed
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = [2.61329125] Angstroms and c = 3.4139893964555132 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -17.182858
         Iterations: 78
         Function evaluations: 168
Results for this minimization:
  a = 3.5461109174380065, c = 2.8899933117054695, total energy = -17.182857630688716

Attempting to perform relaxation using initial lattice constant guess of a = [2.61329125] Angstroms and c = 3.627363733733983 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -17.182858
         Iterations: 77
         Function evaluations: 166
Results for this minimization:
  a = 3.5461108603452782, c = 2.88999341892373, total energy = -17.182857630688613

Attempting to perform relaxation using initial lattice constant guess of a = [2.61329125] Angstroms and c = 3.8407380710124523 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -17.182858
         Iterations: 76
         Function evaluations: 162
Results for this minimization:
  a = 3.5461110414601325, c = 2.8899931873190465, total energy = -17.182857630688563

Attempting to perform relaxation using initial lattice constant guess of a = [2.61329125] Angstroms and c = 4.054112408290922 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 75
         Function evaluations: 164
Results for this minimization:
  a = 2.6132721568923145, c = 4.267549095916375, total energy = -13.83861948611442

Attempting to perform relaxation using initial lattice constant guess of a = [2.61329125] Angstroms and c = 4.267486745569391 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 68
         Function evaluations: 149
Results for this minimization:
  a = 2.613272266108745, c = 4.2675487829608105, total energy = -13.838619486114307

Attempting to perform relaxation using initial lattice constant guess of a = [2.61329125] Angstroms and c = 4.480861082847861 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 71
         Function evaluations: 153
Results for this minimization:
  a = 2.613272187898589, c = 4.267549019120366, total energy = -13.8386194861145

Attempting to perform relaxation using initial lattice constant guess of a = [2.61329125] Angstroms and c = 4.694235420126331 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 75
         Function evaluations: 163
Results for this minimization:
  a = 2.6132722122903282, c = 4.267548929768241, total energy = -13.838619486114446

Attempting to perform relaxation using initial lattice constant guess of a = [2.61329125] Angstroms and c = 4.9076097574048 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -13.838619
         Iterations: 100
         Function evaluations: 206
Results for this minimization:
  a = 2.6132721378278396, c = 4.267549159350312, total energy = -13.838619486114387

Attempting to perform relaxation using initial lattice constant guess of a = [2.61329125] Angstroms and c = 5.120984094683269 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -13.118934
         Iterations: 99
         Function evaluations: 232
Results for this minimization:
  a = 2.530691505276879, c = 6.000068691632816, total energy = -13.118934211784875